HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 548

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

13. Bus State Controller (BSC)
Rev.4.00 Oct. 10, 2008 Page 448 of 1122
REJ09B0370-0400
CKIO
CSn
RD/WR
RAS
CASS
DQMn
D31–D0
BS
CKE
H'00000000
RTCSR.CKS2–0
External bus
Refresh
request
RTCOR-1
RTCNT value
TRr1
Figure 13.36 Synchronous DRAM Auto-Refresh Timing
Refresh request cleared
by start of refresh cycle
TRr2
= 000
Figure 13.35 Auto-Refresh Operation
TRr3
≠ 000
TRr4
TRrw
RTCNT cleared to 0 when
RTCNT = RTCOR
TRr5
Auto-refresh cycle
Trc
Trc
Trc
Time